Method for treating well blockage through camera positioning and sectioning blasting

Abstract

The invention discloses a method for treating well blockage through camera positioning and sectioning blasting. The method comprises the following steps of: (1) building a drilling construction platform: building the drilling construction platform above a blockage section in a blocked well to be treated; (2) utilizing a sleeve pipe to follow up drilling: utilizing the drilling construction platform for pore-forming from top to bottom along a central line of the blockage section; (3) treating the blocked well through sectioning blasting as follows: 301, blasting a blockage segment on the bottom: primarily upwards pulling the sleeve pipe and filling through camera monitoring, secondarily upwards pulling the sleeve pipe, blasting explosives, and judging whether the blocked well to be treated is through up and down or not through camera monitoring; 302, blasting a last blockage segment; and 303, judging whether the blocked well to be treated is through up and down or not; and (4) finishing the whole blocked well treatment process. The method has simple steps, is convenient to realize, and has strong operability, good use effect and small construction condition limitation, so that the construction progress of blocked well treatment is greatly accelerated, the cost is saved, and the safety of blocked well treatment construction can be ensured.

Description

technical field [0001] The invention relates to a treatment method for well plugging, in particular to a method for treating well plugging by segmental blasting with camera and positioning. Background technique [0002] With the development of my country's hydropower industry and the continuous improvement of engineering construction levels, vertical shafts and inclined shafts in water conservancy and hydropower projects are also developing in the direction of ultra-deep and ultra-large diameters. Considering the construction plan, full-section excavation is uneconomical and reasonable, so generally All take the excavation of the slag guide shaft first, and then expand the excavation, and the gravel slides to the lower flat hole through the slag guide shaft for slag discharge. During the expansion and excavation construction, the well is often blocked due to geological and human factors. At present, there are many methods for dealing with well plugging, but most of them have...

AI Technical Summary

Problems solved by technology

[0007] Fourth, bamboo pole top charge blasting method: suitable for short blockage length and within 5m from the bottom of the inclined shaft. This method is simple and fast in construction, but poor in safety;

[0010] Seventh, the method of digging down: it is suitable for blockage in any situation. This method has low efficiency, poor safety conditions, and difficult slag removal. Generally, this method is not used.

[0011] In summary, the above-mentioned conventional well plugging treatment methods all have some deficiencies and limitations in use conditions to varying degrees.

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